This commit improves some of the comments for the Wifi Hidl APIs.
Bug: 148236141
Test: No test is done
Change-Id: Iff6b191c8b258615ddaacad570b81f0ada968ed4
Add a Wifi HAL interface to set MAC address.
The default implementation is to bring the interface down, change the
MAC address, and then bring the interface back up.
Bug: 74347653
Test: vts, manual testing
Change-Id: Ic740d94ec2fcb37e6743d0f3e967f3f4b6afb57d